coma

[ koh-muh ]

/ ˈkoʊ mə /

SEE SYNONYMS FOR coma ON THESAURUS.COM

noun, plural co·mas.

a state of prolonged unconsciousness, including a lack of response to stimuli, from which it is impossible to rouse a person.

Origin of coma

First recorded in 1640–50, coma is from the Greek word kôma deep sleep

Words nearby coma

Colwyn Bay, coly, colza, colza oil, COM, coma, coma aberration, Coma Berenices, comaker, comal, co-manage

Definition for coma (2 of 2)

coma²

[ koh-muh ]

/ ˈkoʊ mə /

noun, plural co·mae [koh-mee]. /ˈkoʊ mi/.

Astronomy. the nebulous envelope around the nucleus of a comet.

Optics. a monochromatic aberration of a lens or other optical system in which the image from a point source cannot be brought into focus, the image of a point having the shape of a comet.

Botany.

a tuft of silky hairs at the end of a seed.
the leafy crown of a tree; cluster of leaves at the end of a stem.
a terminal cluster of bracts, as in the pineapple.

Origin of coma

1660–70; <Latin: hair <Greek kómē

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for coma

The peace process is in a coma; and ISIS, Hamas, Assad, Hezbollah, and the Iranian mullahs make Israel look like the good guys.
The Inside Story of U.S. Meddling in Israel’s Elections|Aaron David Miller|December 4, 2014|DAILY BEAST
Everything changes when Rick slips into a coma after being shot while pursuing a criminal.
The Walking Dead’s Luke Skywalker: Rick Grimes Is the Perfect Modern-Day Mythical Hero|Regina Lizik|October 28, 2014|DAILY BEAST
For Rick, who awakens from his coma months after the dead have risen, the world changes overnight.
The Walking Dead’s Luke Skywalker: Rick Grimes Is the Perfect Modern-Day Mythical Hero|Regina Lizik|October 28, 2014|DAILY BEAST
While he was in a coma for seven days, his consciousness entered a series of transcendent realms.
Eben Alexander Has a GPS for Heaven|Patricia Pearson|October 8, 2014|DAILY BEAST

Nine months later, he awakens from his coma with washboard abs and the ability to run really fast.
‘The Flash’ Review: Teen Angst Gets a Comic Book Quickie|Sujay Kumar|October 7, 2014|DAILY BEAST
When coma or profound stupor exists, it may become jerking and spasmodic, or even simulate the stertorous respiration of apoplexy.
A System of Practical Medicine by American Authors, Vol. I|Various
As though coming out of a coma, it was raising its bizarre head and trying to get on its feet.
Astounding Stories, April, 1931|Various
In a condition almost of coma, he had no measure or count of the hours that passed.
Two Thousand Miles Below|Charles Willard Diffin
On the following day, there was coma, with indications of extreme debility.
On the origin of inflammation of the veins|Henry Lee
We have seen that a well-developed comet of the normal type usually comprises a nucleus, a head or coma, and a tail.
The Story of the Solar System|George F. Chambers

British Dictionary definitions for coma (1 of 2)

coma¹

/ (ˈkəʊmə) /

noun plural -mas

a state of unconsciousness from which a person cannot be aroused, caused by injury to the head, rupture of cerebral blood vessels, narcotics, poisons, etc

Word Origin for coma

C17: from medical Latin, from Greek kōma heavy sleep; related to Greek koitē bed, perhaps to Middle Irish cuma grief

British Dictionary definitions for coma (2 of 2)

coma²

/ (ˈkəʊmə) /

noun plural -mae (-miː)

astronomy the luminous cloud surrounding the frozen solid nucleus in the head of a comet, formed by vaporization of part of the nucleus when the comet is close to the sun

botany

a tuft of hairs attached to the seed coat of some seeds
the terminal crown of leaves of palms and moss stems

optics a type of lens defect characterized by the formation of a diffuse pear-shaped image from a point object

Derived forms of coma

comal, adjective

Word Origin for coma

C17: from Latin: hair of the head, from Greek komē

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Cultural definitions for coma

coma

[ (koh-muh) ]

An abnormal state of deep unconsciousness. A coma may occur as the result of trauma to the head, disease (such as meningitis, stroke, or diabetes mellitus), or poisoning.

Medical definitions for coma

coma

[ kō′mə ]

n.

A state of profound unconsciousness in which an individual is incapable of sensing or responding to external stimuli.

Scientific definitions for coma (1 of 2)

coma¹

[ kō′mə ]

Plural comas

A state of deep unconsciousness, usually resulting from brain trauma or metabolic disease, in which an individual is incapable of sensing or responding to external stimuli.

Scientific definitions for coma (2 of 2)

coma²

[ kō′mə ]

Plural comae (kō′mē)

Astronomy The brightly shining cloud of gas that encircles the nucleus and makes up the major portion of the head of a comet near the Sun. As a comet moves along its orbit away from the Sun, the gas and dust of the coma dissipate, leaving only the nucleus. A coma can have a diameter of up to 100,000 km (62,000 mi.). See more at comet.

Physics A diffuse, comet-shaped image of a point source of light or radiation caused by aberration in a lens or mirror. The image appears progressively elongated with distance from the center of the field of view.

单词	coma
释义	coma ¹ [ koh-muh ] / ˈkoʊ mə / SEE SYNONYMS FOR coma ON THESAURUS.COM noun, plural co·mas. a state of prolonged unconsciousness, including a lack of response to stimuli, from which it is impossible to rouse a person. Origin of coma ¹ First recorded in 1640–50, coma is from the Greek word kôma deep sleep Words nearby coma Colwyn Bay, coly, colza, colza oil, COM, coma, coma aberration, Coma Berenices, comaker, comal, co-manage Definition for coma (2 of 2) coma² [ koh-muh ] / ˈkoʊ mə / noun, plural co·mae [koh-mee]. /ˈkoʊ mi/. Astronomy. the nebulous envelope around the nucleus of a comet. Optics. a monochromatic aberration of a lens or other optical system in which the image from a point source cannot be brought into focus, the image of a point having the shape of a comet. Botany. a tuft of silky hairs at the end of a seed. the leafy crown of a tree; cluster of leaves at the end of a stem. a terminal cluster of bracts, as in the pineapple. Origin of coma ² 1660–70; <Latin: hair <Greek kómē Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for coma The peace process is in a coma; and ISIS, Hamas, Assad, Hezbollah, and the Iranian mullahs make Israel look like the good guys. The Inside Story of U.S. Meddling in Israel’s Elections\|Aaron David Miller\|December 4, 2014\|DAILY BEAST Everything changes when Rick slips into a coma after being shot while pursuing a criminal. The Walking Dead’s Luke Skywalker: Rick Grimes Is the Perfect Modern-Day Mythical Hero\|Regina Lizik\|October 28, 2014\|DAILY BEAST For Rick, who awakens from his coma months after the dead have risen, the world changes overnight. The Walking Dead’s Luke Skywalker: Rick Grimes Is the Perfect Modern-Day Mythical Hero\|Regina Lizik\|October 28, 2014\|DAILY BEAST While he was in a coma for seven days, his consciousness entered a series of transcendent realms. Eben Alexander Has a GPS for Heaven\|Patricia Pearson\|October 8, 2014\|DAILY BEAST Nine months later, he awakens from his coma with washboard abs and the ability to run really fast. ‘The Flash’ Review: Teen Angst Gets a Comic Book Quickie\|Sujay Kumar\|October 7, 2014\|DAILY BEAST When coma or profound stupor exists, it may become jerking and spasmodic, or even simulate the stertorous respiration of apoplexy. A System of Practical Medicine by American Authors, Vol. I\|Various As though coming out of a coma, it was raising its bizarre head and trying to get on its feet. Astounding Stories, April, 1931\|Various In a condition almost of coma, he had no measure or count of the hours that passed. Two Thousand Miles Below\|Charles Willard Diffin On the following day, there was coma, with indications of extreme debility. On the origin of inflammation of the veins\|Henry Lee We have seen that a well-developed comet of the normal type usually comprises a nucleus, a head or coma, and a tail. The Story of the Solar System\|George F. Chambers British Dictionary definitions for coma (1 of 2) coma¹ / (ˈkəʊmə) / noun plural -mas a state of unconsciousness from which a person cannot be aroused, caused by injury to the head, rupture of cerebral blood vessels, narcotics, poisons, etc Word Origin for coma C17: from medical Latin, from Greek kōma heavy sleep; related to Greek koitē bed, perhaps to Middle Irish cuma grief British Dictionary definitions for coma (2 of 2) coma² / (ˈkəʊmə) / noun plural -mae (-miː) astronomy the luminous cloud surrounding the frozen solid nucleus in the head of a comet, formed by vaporization of part of the nucleus when the comet is close to the sun botany a tuft of hairs attached to the seed coat of some seeds the terminal crown of leaves of palms and moss stems optics a type of lens defect characterized by the formation of a diffuse pear-shaped image from a point object Derived forms of coma comal, adjective Word Origin for coma C17: from Latin: hair of the head, from Greek komē Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Words related to coma slumber, oblivion, stupor, trance, torpor, torpidity, lethargy, syncope, insensibility, swoon, hebetude, sleep, faint, dullness, blackout, somnolence Cultural definitions for coma coma [ (koh-muh) ] An abnormal state of deep unconsciousness. A coma may occur as the result of trauma to the head, disease (such as meningitis, stroke, or diabetes mellitus), or poisoning. The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Medical definitions for coma coma [ kō′mə ] n. A state of profound unconsciousness in which an individual is incapable of sensing or responding to external stimuli. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for coma (1 of 2) coma¹ [ kō′mə ] Plural comas A state of deep unconsciousness, usually resulting from brain trauma or metabolic disease, in which an individual is incapable of sensing or responding to external stimuli. Scientific definitions for coma (2 of 2) coma² [ kō′mə ] Plural comae (kō′mē) Astronomy The brightly shining cloud of gas that encircles the nucleus and makes up the major portion of the head of a comet near the Sun. As a comet moves along its orbit away from the Sun, the gas and dust of the coma dissipate, leaving only the nucleus. A coma can have a diameter of up to 100,000 km (62,000 mi.). See more at comet. Physics A diffuse, comet-shaped image of a point source of light or radiation caused by aberration in a lens or mirror. The image appears progressively elongated with distance from the center of the field of view. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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coma

noun, plural co·mas.

Origin of coma

Words nearby coma

Definition for coma (2 of 2)

noun, plural co·mae [koh-mee]. /ˈkoʊ mi/.

Origin of coma

Example sentences from the Web for coma

British Dictionary definitions for coma (1 of 2)

noun plural -mas

Word Origin for coma

British Dictionary definitions for coma (2 of 2)

noun plural -mae (-miː)

Derived forms of coma

Word Origin for coma

Words related to coma

Cultural definitions for coma

Medical definitions for coma

n.

Scientific definitions for coma (1 of 2)

Plural comas

Scientific definitions for coma (2 of 2)

Plural comae (kō′mē)